Clinico-microbiological Features and Treatment Outcomes of Serratia Keratitis and Comparison with Pseudomonas aeruginosa Keratitis.

To describe clinico-microbiological features and outcomes of Serratia keratitis and to compare them with Pseudomonas aeruginosa keratitis. Cases of microbiologically proven Serratia keratitis and P. aeruginosa keratitis were reviewed. Data regarding demographic and clinical characteristics, and outcomes were recorded. 39 patients with pure Serratia keratitis were included. Median presenting vision was 1.8 logMAR (IQR, 0.8–2.4) and median infiltrate size was 5 mm (IQR 3–7.8 mm). An ocular risk factor was present in 35 (89.7%) cases. S. marcescens was the most common species (31/39, 79.5%). Medical resolution was observed in 36/39 (92.3%) cases, while three (7.7%) eyes needed penetrating keratoplasty. On comparing with P. aeruginosa keratitis (58 eyes), no difference in outcomes (p =.14) was noted. Serratia keratitis usually occurs in eyes with a compromised surface and has good resolution with medical therapy. Both Serratia and P. aeruginosa keratitis have similar outcomes. [ABSTRACT FROM AUTHOR]